As proper nouns the difference between tammy and thomasina
is that tammy is a female given name popular in the 1960s and the 1970s while thomasina is , a feminine form of thomas.
tammy
Etymology 1
Origin uncertain; compare obsolete French tamise (but if there was borrowing, it's unclear in which direction).
Noun
(tammies)
A kind of woolen, or woolen and cotton, cloth, often highly glazed, used for curtains, sieves, strainers, etc.
Etymology 2
From (etyl) tamis, assimilated to Etymology 1, above.
Noun
(tammies)
A sieve, or strainer; a tamis.
Etymology 3
Shortened from (tammy shanter).
Noun
(tammies)
A tam o’shanter hat.